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Android APIs
Summary: Methods | [Expand All]
Since: API Level 1
public interface

SocketFactory

org.apache.http.conn.scheme.SocketFactory
Known Indirect Subclasses

Class Overview

A factory for creating and connecting sockets. The factory encapsulates the logic for establishing a socket connection.
Both Object.equals() and Object.hashCode() must be overridden for the correct operation of some connection managers.

Summary

Public Methods
abstract Socket connectSocket(Socket sock, String host, int port, InetAddress localAddress, int localPort, HttpParams params)
Connects a socket to the given host.
abstract Socket createSocket()
Creates a new, unconnected socket.
abstract boolean isSecure(Socket sock)
Checks whether a socket provides a secure connection.

Public Methods

public abstract Socket connectSocket (Socket sock, String host, int port, InetAddress localAddress, int localPort, HttpParams params)

Since: API Level 1

Connects a socket to the given host.

Parameters
sock the socket to connect, as obtained from createSocket. null indicates that a new socket should be created and connected.
host the host to connect to
port the port to connect to on the host
localAddress the local address to bind the socket to, or null for any
localPort the port on the local machine, 0 or a negative number for any
params additional parameters for connecting
Returns
  • the connected socket. The returned object may be different from the sock argument if this factory supports a layered protocol.
Throws
IOException if an I/O error occurs
UnknownHostException if the IP address of the target host can not be determined
ConnectTimeoutException if the socket cannot be connected within the time limit defined in the params

public abstract Socket createSocket ()

Since: API Level 1

Creates a new, unconnected socket. The socket should subsequently be passed to connectSocket.

Returns
  • a new socket
Throws
IOException if an I/O error occurs while creating the socket

public abstract boolean isSecure (Socket sock)

Since: API Level 1

Checks whether a socket provides a secure connection. The socket must be connected by this factory. The factory will not perform I/O operations in this method.
As a rule of thumb, plain sockets are not secure and TLS/SSL sockets are secure. However, there may be application specific deviations. For example, a plain socket to a host in the same intranet ("trusted zone") could be considered secure. On the other hand, a TLS/SSL socket could be considered insecure based on the cypher suite chosen for the connection.

Parameters
sock the connected socket to check
Returns
  • true if the connection of the socket should be considered secure, or false if it should not
Throws
IllegalArgumentException if the argument is invalid, for example because it is not a connected socket or was created by a different socket factory. Note that socket factories are not required to check these conditions, they may simply return a default value when called with an invalid socket argument.